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Finding the Fourth Proportional to 12,888, 17,786.52 and 8,170.56

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Solution

The fourth proportional to 12,888, 17,786.52 and 8,170.56 is: 11,276.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888 : 17,786.52 = 8,170.56 : x
  2. Step 2: Convert to fraction form
    12,888/17,786.52 = 8,170.56/x
  3. Step 3: Cross multiply
    12,888x = 17,786.52 × 8,170.56
  4. Step 4: Simplify right side
    12,888x = 145,325,828.85
  5. Step 5: Solve for x
    x = 145,325,828.85/12,888
  6. Step 6: Final answer
    x = 11,276.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.